Darning machine for hose-shaped work



" Dec. 30, 1952 K. SCHEIWILLER 2,623,486

DARNING MACHINE FOR HOSE-SHAPED WORK Filed Aug. 4, 1948 2 SHEETS-SHEET 2 Patented Dec. 3%, 1952 UNITED STATES ATENT OFFICE r DARNING MACHINE FOR HGSE-SHAPED WORK a Swiss corporation Application August 4, 1943, Serial No. 42,433 In Switzerland June 1, 1M8

2 Claims.

With the known sewing, darning or mending machines with a free working arm the uniform tensioning and displacing of the hose-shaped work, such as stockings or socks, with the help of the shape of the work arm of the machine is connected with difficulties. Also the lifting of dropped meshes by means of dropped-mesh lifters is tedious and only to be done with difficulty since the hose-shaped Work can only be tensioned with one hand.

The object of the present invention is a darning machine adapted in particular for hoseshaped work, such as stockings and the like, having an upper arm and connected with it by means of an intermediate part a lower arm with a broadened head, a driving shaft rotatably mounted and transmission means for the drive of a needle-rod arranged in the upper arm, and a shaft with the spool rotatably arranged in the lower arm, the drive and spool shaft being compulsorily connected with eachcther and geared to each other in such a manner that the spool shaft rotates twice as fast as the shaft in the upper arm.

The object of the present invention is illustrated by way of two examples in the enclosed drawings in which:

Fig. 1 is a section through the darning machine according to the first embodiment,

Fig. 2 a view in perspective according to Fig. 1,

Fig. 3 gives a section through a darning machine according to another embodiment.

The darning machine according to the first embodiment shown in Figures 1 and 2 has a stand with an upper arm l, a lower arm 2 and an intermediate part 3 which connects the two arms with each other and secures them in the correct position to each other. In the upper arm a drive shaft 4 is mounted rotatably in the bearings 5 and 8. At its left hand end it is provided with a crank l, the crank pin 8 of which is connected to pivot It of needle rod I! by means of connecting rod 9, and on rotation of the driving shaft 4 the crank moves the needle rod having the needle 12 secured to its lower end up and down. The needle rod is displaceably and vertically guided in bearings l3 and it in upper arm l, and on its lower part two dogs !5 and It are secured with which it operates the lever H of a dropped mesh device when the needle rod is moved up and down by the driving mechanism. On the driving shaft 5 the eccentric 59 for the operation of the thread tensioner 2E! and in addition the bevel gears 21 and 22 are secured. The bevel gear 2| meshes with the small bevel gear nr m) 23 arranged below it and secured to the vertical shaft 24, said shaft being mounted in the bearings 24-11 and 24-2) and having rigidly connected to its lower end the bevel gear 25. This bevel gear meshes with the bevel gear 2'6 which is securely fixed to shaft 21 rotatably mounted in bearings 21-a and 21-h setting said shaft in retation. The end of shaft 21 pointing upward is stepped back in bearing 2'l-b and on its head 29 with the circular shuttle is pushed on so that said shuttle together with the head can be easily exchanged. The circular shuttle 3!! is covered by means of a semi-spherical cap 3| which is supported by arm 2. The cap itself is provided with an opening 32 through which needle It can cooperate with the shuttle. Above the cap the dropped-mesh lifter 33 is arranged on the lower side of upper arm l on bearing 18 for pivoting about bearing pin 34. The needle 35 of said lifter is moved to and fro by the lever ll pivoting about pin 35 on bearing [8 by means of the dogs Hi, It on the needle rod when the latter is reciprocated. The other bevel gear secured to drive shaft 4 serves for driving the driving shaft. With it the bevel gear 31 fixed to the rotor shaft of the electric motor 38 meshes. The electric motor 33 itself is carried for oscillation about axis 39 by bearing stirrup 40 fixed to the intermediate part 3. At the upper end of said motor a tension spring M is provided one end of which is fixed to the inside of upper arm I and the other end to the motor in such a manner that the bevel gear 3'! is elastically held in mesh with gear 22. The current supply is led in by means of plug 62 and cable 43, the current interruption being capable of being carried out by means of a known cut-out switch operated by the feet or the knee. In addition a bevel pinion secured to shaft 44 arranged at right angles to driving shaft 4 meshes with the bevel gear 22, shaft 44 having a small hand wheel 43 arranged on the outside of the upper arm, said wheel enabling the needle rod to be moved by hand. In the bottom of upper arm I a small lam-p 46 for illumination of the place of Work is adjustably fitted. A clamping device 41 on the intermediate part serves for fixing the machine to a table or the like.

The darning machine according to another embodiment is represented in section by Figure 3. The upper arm 8 and the lower arm are arranged parallel to each other, but inclined at an angle of 45 to the horizontal. For driving the needle rod 73 and the needle 66 a crank disk 59, a crank 10 and a connecting rod H are again used, said connecting rod connecting with the head 12 of the needle rod 13. The crank disk 69 is securely fixed to the right hand end of the driving shaft 49, on which shaft the chain wheel 86 is mounted and on the left hand end the hand wheel 81 are secured. In the lower arm 85 the gripper shaft 88 is rotatably mounted, said shaft carrying th gripper 89 securely at its right hand end. On the left hand side of gripper shaft 88 the chain wheel 89 is securely connected with it. The chain wheels have a ratio of two for chain wheel 86 and one for chain wheel 89 and over the two a common endless chain 90 is slung. On the outer end of the left hand side of shaft 88 a friction wheel 9| is secured which is in contact with the small friction wheel 92 of the electric motor 93 said motor bein mounted in the housing 95 of the sewing machine for oscillation about axis 94. A tension spring 96 holds the small friction wheel 92 on the motor shaft in contact with the large friction wheel 9|. In connection with a switch not shown in the drawing the sewing machine can be put into or out of operation in any desired manner by the electric motor 93.

Instead of the transmission of motion between the driving and the gripper shaft by means of a chain a connecting shaft with a pair of bevel gears each at each end of the shaft can be used. All the known additional equipment in particular, such as for zigzag darning or darnin with a ring, can be used with the machine.

The machine is normally fixed to the table at right angles to the table edge.

'However, a stud with a ball-head can be provided on the machine base, which ball-head can be clamped in a ball-socket in its turn clamped to the table thus enabling the machine to be tilted and secured in any position desired.

What I claim is:

1. A darning machine, for hose-shaped work such as stockings, including an upper arm, a crankshaft rotatable in said upper arm, a displaceable needle bar with a needle positioned at right angles to said crankshaft, a head for supporting the work piece arranged opposite to said needle and connected with said upper arm, said head being broadened on its top and formed with an arched surface, a circular shuttle rotatably arranged in said head in operative connection with said needle for forming loops, a drive shaft on which said shuttle rotates in positive connection with said crankshaft and forming loops with said needle, said crankshaft, needle bar, and needle being positioned at an obtuse angle to said drive shaft of said shuttle and said darning head, a downward receding arm positioned at an obtuse angle to the horizontal, on the end of which said circular shuttle is arranged.

2. A darning machine for hose-shaped work such as stockings, including an upper arm, a crankshaft rotatable in said upper arm, a displaceable needle bar with a needle positioned at right angles to said crankshaft, a head for supporting the work piece arranged opposite to said needle and connected with said upper arm, said head being broadened on its top and formed with an arched surface, a circular shuttle rotatably arranged in said head in operative connection with said needle for forming loops, a driveshaft on which said shuttle rotates in positive connection with said crankshaft and forming loops with said needle, said crankshaft, needle bar, and needle being positioned at an obtuse angle to said drive shaft of said shuttle and said darning head, a downward receding arm positioned at an obtuse angle to the horizontal, on the end of which said circular shuttle is arranged, the crankshaft being positioned horizontally and having a vertically arranged axle driving the axle of the circular shuttle at an obtuse angle.

KARL SCHEIWILLER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 

